Why would any sensible Libertarian support abandoning Afghanistan to the Taliban?

Welcome to Ask a Libertarian 2012 with Reason's Nick Gillespie and Matt
Welch. They are the authors of the book The Declaration of Independents:
How Libertarian Politics Can Fix What's Wrong With America, coming out in
paperback later this month. Pre-order:
http://www.amazon.com/The-Declaration-Independents-Libertarian-Politics/dp/16...

On June 12, 2012 Gillespie and Welch used short, rapid-fire videos to
answer dozens of reader questions submitted via email, Twitter, Facebook,
and Reason.com.

In this episode, they answer the question:
"Why would any sensible Libertarian support abandoning Afghanistan to the Taliban and eventually to Al-Qaeda?"

Produced by Meredith Bragg, Jim Epstein, Josh Swain, and Tracy Oppenheimer
with help from Katie Hooks.

To watch answers from 2011's Ask a Libertarian series, go here: http://www.youtube.com/playlist?list=PL32326BFC1F59AEFE